Control circuit, bias circuit, and control method
US11085954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2019 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Nov 15, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit can be applied to a bias circuit including a first transistor and a second transistor with their gates connected. The first and second transistors are configured to amplify an input reference direct current (DC) current of the bias circuit to obtain a bias DC current. The control circuit includes: a detection circuit configured to compare a first DC voltage with a second DC voltage to obtain a comparison result; the first DC voltage being a drain DC voltage of the first transistor; and the second DC voltage being a drain DC voltage of the second transistor; and an adjustment circuit configured to adjust the first DC voltage and the second DC voltage by using the comparison result, such that the drain DC voltage of the first transistor equals the drain DC voltage of the second transistor when the bias circuit is in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.